#include <linux/irq.h>
#include <linux/dmi.h>
#include <asm/numa.h>
-#include "pci.h"
+#include <asm/pci_x86.h>
-static int __devinit can_skip_ioresource_align(struct dmi_system_id *d)
+struct pci_root_info {
+ struct acpi_device *bridge;
+ char *name;
+ unsigned int res_num;
+ struct resource *res;
+ struct pci_bus *bus;
+ int busnum;
+};
+
+static acpi_status
+resource_to_addr(struct acpi_resource *resource,
+ struct acpi_resource_address64 *addr)
{
- pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
- printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
- return 0;
+ acpi_status status;
+
+ status = acpi_resource_to_address64(resource, addr);
+ if (ACPI_SUCCESS(status) &&
+ (addr->resource_type == ACPI_MEMORY_RANGE ||
+ addr->resource_type == ACPI_IO_RANGE) &&
+ addr->address_length > 0 &&
+ addr->producer_consumer == ACPI_PRODUCER) {
+ return AE_OK;
+ }
+ return AE_ERROR;
}
-static struct dmi_system_id acpi_pciprobe_dmi_table[] = {
-/*
- * Systems where PCI IO resource ISA alignment can be skipped
- * when the ISA enable bit in the bridge control is not set
- */
- {
- .callback = can_skip_ioresource_align,
- .ident = "IBM System x3800",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
- DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
- },
- },
- {
- .callback = can_skip_ioresource_align,
- .ident = "IBM System x3850",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
- DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
- },
- },
- {
- .callback = can_skip_ioresource_align,
- .ident = "IBM System x3950",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
- DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
- },
- },
- {}
-};
+static acpi_status
+count_resource(struct acpi_resource *acpi_res, void *data)
+{
+ struct pci_root_info *info = data;
+ struct acpi_resource_address64 addr;
+ acpi_status status;
+
+ status = resource_to_addr(acpi_res, &addr);
+ if (ACPI_SUCCESS(status))
+ info->res_num++;
+ return AE_OK;
+}
+
+static int
+bus_has_transparent_bridge(struct pci_bus *bus)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ u16 class = dev->class >> 8;
+
+ if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent)
+ return true;
+ }
+ return false;
+}
+
+static void
+align_resource(struct acpi_device *bridge, struct resource *res)
+{
+ int align = (res->flags & IORESOURCE_MEM) ? 16 : 4;
+
+ /*
+ * Host bridge windows are not BARs, but the decoders on the PCI side
+ * that claim this address space have starting alignment and length
+ * constraints, so fix any obvious BIOS goofs.
+ */
+ if (!IS_ALIGNED(res->start, align)) {
+ dev_printk(KERN_DEBUG, &bridge->dev,
+ "host bridge window %pR invalid; "
+ "aligning start to %d-byte boundary\n", res, align);
+ res->start &= ~(align - 1);
+ }
+ if (!IS_ALIGNED(res->end + 1, align)) {
+ dev_printk(KERN_DEBUG, &bridge->dev,
+ "host bridge window %pR invalid; "
+ "aligning end to %d-byte boundary\n", res, align);
+ res->end = ALIGN(res->end, align) - 1;
+ }
+}
+
+static acpi_status
+setup_resource(struct acpi_resource *acpi_res, void *data)
+{
+ struct pci_root_info *info = data;
+ struct resource *res;
+ struct acpi_resource_address64 addr;
+ acpi_status status;
+ unsigned long flags;
+ struct resource *root;
+ int max_root_bus_resources = PCI_BUS_NUM_RESOURCES;
+ u64 start, end;
+
+ if (bus_has_transparent_bridge(info->bus))
+ max_root_bus_resources -= 3;
+
+ status = resource_to_addr(acpi_res, &addr);
+ if (!ACPI_SUCCESS(status))
+ return AE_OK;
+
+ if (addr.resource_type == ACPI_MEMORY_RANGE) {
+ root = &iomem_resource;
+ flags = IORESOURCE_MEM;
+ if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
+ flags |= IORESOURCE_PREFETCH;
+ } else if (addr.resource_type == ACPI_IO_RANGE) {
+ root = &ioport_resource;
+ flags = IORESOURCE_IO;
+ } else
+ return AE_OK;
+
+ start = addr.minimum + addr.translation_offset;
+ end = start + addr.address_length - 1;
+ if (info->res_num >= max_root_bus_resources) {
+ if (pci_probe & PCI_USE__CRS)
+ printk(KERN_WARNING "PCI: Failed to allocate "
+ "0x%lx-0x%lx from %s for %s due to _CRS "
+ "returning more than %d resource descriptors\n",
+ (unsigned long) start, (unsigned long) end,
+ root->name, info->name, max_root_bus_resources);
+ return AE_OK;
+ }
+
+ res = &info->res[info->res_num];
+ res->name = info->name;
+ res->flags = flags;
+ res->start = start;
+ res->end = end;
+ res->child = NULL;
+ align_resource(info->bridge, res);
+
+ if (!(pci_probe & PCI_USE__CRS)) {
+ dev_printk(KERN_DEBUG, &info->bridge->dev,
+ "host bridge window %pR (ignored)\n", res);
+ return AE_OK;
+ }
+
+ if (insert_resource(root, res)) {
+ dev_err(&info->bridge->dev,
+ "can't allocate host bridge window %pR\n", res);
+ } else {
+ info->bus->resource[info->res_num] = res;
+ info->res_num++;
+ if (addr.translation_offset)
+ dev_info(&info->bridge->dev, "host bridge window %pR "
+ "(PCI address [%#llx-%#llx])\n",
+ res, res->start - addr.translation_offset,
+ res->end - addr.translation_offset);
+ else
+ dev_info(&info->bridge->dev,
+ "host bridge window %pR\n", res);
+ }
+ return AE_OK;
+}
+
+static void
+get_current_resources(struct acpi_device *device, int busnum,
+ int domain, struct pci_bus *bus)
+{
+ struct pci_root_info info;
+ size_t size;
+
+ if (!(pci_probe & PCI_USE__CRS))
+ dev_info(&device->dev,
+ "ignoring host bridge windows from ACPI; "
+ "boot with \"pci=use_crs\" to use them\n");
+
+ info.bridge = device;
+ info.bus = bus;
+ info.res_num = 0;
+ acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
+ &info);
+ if (!info.res_num)
+ return;
+
+ size = sizeof(*info.res) * info.res_num;
+ info.res = kmalloc(size, GFP_KERNEL);
+ if (!info.res)
+ goto res_alloc_fail;
+
+ info.name = kmalloc(16, GFP_KERNEL);
+ if (!info.name)
+ goto name_alloc_fail;
+ sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum);
+
+ info.res_num = 0;
+ acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
+ &info);
+
+ return;
+
+name_alloc_fail:
+ kfree(info.res);
+res_alloc_fail:
+ return;
+}
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
{
struct pci_bus *bus;
struct pci_sysdata *sd;
+ int node;
+#ifdef CONFIG_ACPI_NUMA
int pxm;
+#endif
- dmi_check_system(acpi_pciprobe_dmi_table);
+ if (domain && !pci_domains_supported) {
+ printk(KERN_WARNING "pci_bus %04x:%02x: "
+ "ignored (multiple domains not supported)\n",
+ domain, busnum);
+ return NULL;
+ }
+
+ node = -1;
+#ifdef CONFIG_ACPI_NUMA
+ pxm = acpi_get_pxm(device->handle);
+ if (pxm >= 0)
+ node = pxm_to_node(pxm);
+ if (node != -1)
+ set_mp_bus_to_node(busnum, node);
+ else
+#endif
+ node = get_mp_bus_to_node(busnum);
+
+ if (node != -1 && !node_online(node))
+ node = -1;
/* Allocate per-root-bus (not per bus) arch-specific data.
* TODO: leak; this memory is never freed.
*/
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd) {
- printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
+ printk(KERN_WARNING "pci_bus %04x:%02x: "
+ "ignored (out of memory)\n", domain, busnum);
return NULL;
}
- if (domain != 0) {
- printk(KERN_WARNING "PCI: Multiple domains not supported\n");
+ sd->domain = domain;
+ sd->node = node;
+ /*
+ * Maybe the desired pci bus has been already scanned. In such case
+ * it is unnecessary to scan the pci bus with the given domain,busnum.
+ */
+ bus = pci_find_bus(domain, busnum);
+ if (bus) {
+ /*
+ * If the desired bus exits, the content of bus->sysdata will
+ * be replaced by sd.
+ */
+ memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(sd);
- return NULL;
+ } else {
+ bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
+ if (bus) {
+ get_current_resources(device, busnum, domain, bus);
+ bus->subordinate = pci_scan_child_bus(bus);
+ }
}
- sd->node = -1;
-
- pxm = acpi_get_pxm(device->handle);
-#ifdef CONFIG_ACPI_NUMA
- if (pxm >= 0)
- sd->node = pxm_to_node(pxm);
-#endif
-
- bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
if (!bus)
kfree(sd);
+ if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
- if (bus != NULL) {
- if (pxm >= 0) {
- printk("bus %d -> pxm %d -> node %d\n",
- busnum, pxm, sd->node);
- }
- }
+ if (pxm >= 0)
+ dev_printk(KERN_DEBUG, &bus->dev,
+ "on NUMA node %d (pxm %d)\n", node, pxm);
+#else
+ dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
#endif
-
+ }
+
return bus;
}
-extern int pci_routeirq;
-static int __init pci_acpi_init(void)
+int __init pci_acpi_init(void)
{
struct pci_dev *dev = NULL;
- if (pcibios_scanned)
- return 0;
-
if (acpi_noirq)
- return 0;
+ return -ENODEV;
printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
acpi_irq_penalty_init();
- pcibios_scanned++;
pcibios_enable_irq = acpi_pci_irq_enable;
pcibios_disable_irq = acpi_pci_irq_disable;
printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
for_each_pci_dev(dev)
acpi_pci_irq_enable(dev);
- } else
- printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\". If it helps, post a report\n");
-
-#ifdef CONFIG_X86_IO_APIC
- if (acpi_ioapic)
- print_IO_APIC();
-#endif
+ }
return 0;
}
-subsys_initcall(pci_acpi_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff